B–63505EN/02
2. HARDWARE
115
Fine adjustment of the video signal is supported to enable its use with
liquid crystal displays. This adjustment is necessary to compensate for
errors resulting from the combination of NC devices and cables.
Adjustment of the video signal is necessary if you have replaced the
display unit, cable, or a hardware component of the display circuit in the
NC, either as part of regular field maintenance or the correct a failure.
(1)Applied unit
Name Specification number
8.4″ color LCD/MDI unit A02B–0279–C081#TA, #TAS
A02B–0279–C081#MA, #MAS
8.4″ color LCD unit A02B–0279–C050
(2)Adjustment point (as viewed from the rear of the display unit
TM1
SW1
(3)Adjustment method
(a) Display horizontal setting
D The horizontal position of the display is set as described below,
using SW1. Rotating SW1 one notch in the positive (+)
direction shifts the display one dot to the right. Rotating SW1
one notch in the negative (–) direction shifts the display one dot
to the left.
D Set SW1 such that the entire display is visible. There is only one
optimum setting position.
(b)Flickering adjustment
Flickering is eliminated by setting jumper pin TM1. One side of
TM1 is marked A, while the other side is marked B. TM1 is
factory–set to the B position. If the screen flickers, set TM1 to the
A position.
2.8
ADJUSTING THE
FLAT DISPLAY
2.8.1
Adjusting the 8.4″
Color LCD